Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais Pontos têm Touchdowns maiores que 0 e um Extra point menor que 0?
 ###Tabelas: CREATE TABLE affiliate_members (affiliate_members_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Founded INT, Type VARCHAR, Enrollment INT, Nickname VARCHAR, Current Conference VARCHAR, Pac-12 Sports VARCHAR) CREATE TABLE mixed_doubles:_7_5_titles_2_runner-ups (mixed_doubles:_7_5_titles_2_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE singles_titles_14 (singles_titles_14_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE 1970s (1970s_id AUTO_INCREMENT PRIMARY KEY, Year INT, Network VARCHAR, Race caller VARCHAR, s Host VARCHAR, s Analyst VARCHAR, Reporters VARCHAR, Trophy presentation VARCHAR) CREATE TABLE michigan_48_ohio_northern_0 (michigan_48_ohio_northern_0_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Touchdowns INT, Extra points INT, Field goals INT, Points INT)  
SELECT SUM Points FROM michigan_48_ohio_northern_0 WHERE Touchdowns > 0 AND Extra points < 0